Question

[1] A 10 turn coil is wrapped tightly around the center of a long solenoid with...

[1] A 10 turn coil is wrapped tightly around the center of a long solenoid with 6000 turns per meter. When the current in the solenoid is decreasing by 0.5 A/s, calculate the current induced in the 10 turn coil if it has a resistance of 5 ohm and the area of the solenoid opening is 0.01 m2. Give the direction of the current if the original solenoid current was clockwise.

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Answer #1

The flux through the coil is decreasing because of the decreasing current in solenoid which causes the decrease in magnetic field. Hence current induced in coil will be in such a direction so that it strengthens the decreasing flux. Hence the current induced direction must be clockwise.

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